| DOI: | 10.1002/2016GL071790
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| 论文题名: | Seasonal variations in Saturn's plasma sheet warping |
| 作者: | Carbary J.F.; Mitchell D.G.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8347
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| EISSN: | 1944-8078
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| 出版年: | 2016
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| 卷: | 43, 期:23 | | 起始页码: | 11957
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| 结束页码: | 11962
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| 语种: | 英语
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| 英文关键词: | bowl model
; Saturn magnetodisk
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| Scopus关键词: | Magnetometers
; Plasma sheaths
; Best fit
; Cassini mission
; Composite images
; Energetic neutral atoms
; Low latitudes
; Plasma sheet
; Saturn magnetodisk
; Seasonal variation
; Planets
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| 英文摘要: | Composite images of hydrogen and oxygen energetic neutral atoms (ENA) obtained from 2005 through 2015 from the Ion Neutral Camera on Cassini reveal the structure of Saturn's plasma sheet out to ~40 Rs (1 Rs = 60,268 km). Seen from either the dawnside or duskside at low latitude, these composites reveal that the plasma sheet is concave upward (northward) near Saturn's southern solstice, has no concavity near equinox, and is concave downward (southward) near Saturn's northern solstice. This seasonal variation confirms the Arridge “bowl” model developed early in the Cassini mission based on limited magnetometer data, with the concavity depending on the tangent of the Sun's latitude at Saturn and a “hinge” parameter rH. The best fits to the ENA data indicate rH ≈ 25–30 Rs, which is close to the 29 Rs originally suggested by the magnetometer results. The bowl structure suggests other magnetodisks in the solar system and beyond may also undergo similar warping dynamics and may not have a “flat” geometry. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006470388&doi=10.1002%2f2016GL071790&partnerID=40&md5=ac0def04944986b1accc74b563105964
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/9310
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, United States
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| Recommended Citation: | |
Carbary J.F.,Mitchell D.G.. Seasonal variations in Saturn's plasma sheet warping[J]. Geophysical Research Letters,2016-01-01,43(23).
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